90 degree V twin engine (my own design)

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gbritnell:
Thank you one and all for the gracious comments. I have been running it on and off for the last couple of days. It starts great when it's cold but as it warms up I can see the gas being pushed back through the line. My buddy was watching it and he said it seemed like it was vapor locking. It didn't seem right for something like this but as I went to adjust the carb I touched the intake manifold and it was as hot as the head. When the carb got hot and the gas tried to flow to it the heat would push the fuel back into the line. Today I took the intake manifold off and machined .04 from both of the mounting flanges. I then made some insulators to go between the manifold and head. I'll give it another try tomorrow and see if it helped. As with my other engines the tinkering part starts to take almost as much time as the building.
George

madjackghengis:

--- Quote from: zeroaxe on March 16, 2010, 04:10:00 AM ---Wow, just wow! I feel so inadequate watching you guys build these beautiful machines. With the current problems I have with the accuracy of my Chester Model B Super lathe, I almost feel depressed that I wont be able to build these kind of things ........... one day :(

But, dont let me sulking take anything away from the awesome thread/work you do!!!!

--- End quote ---
Dear zeroaxe, I understand the feelings that arise when one's lathe is less than right, but a large part of learning to get the most out of a machine tool is finding the reason for the problem condition, devising a workable solution in your own situation, and bringing it up to standard. Almost every machine tool I own was bought in horrible condition, precisely because I couldn't afford working machines. Without exception, I worked with them broken and gradually managed to find the time, the technology, and the skill to bring them to good condition, and have them produce as they are supposed to. I learned an awful lot rebuilding my first lathe, having found a book on Machine Tool Reconditioning, and spending almost a month reading it before starting the three months of rebuilding my loose, missing parts bad spindle lathe, and finally getting to use it as it was intended. Get inside your lathe and make it right, and you will be far happier than you are now, and the next problem will appear less of an obstacle. Get old books, as the machinists of a hundred years ago had far fewer resources than we have today, and used their ingenuity to get around things we sometimes call impossible. Mad Jack

gbritnell:
Mad Jack is absolutely correct. After looking at my build someone stated, tongue in cheek, "you know you can't build those type of things on a round column mill". You do the best you can with what you have. A good machinist can use a lesser machine and make good parts but a non machinist can't make anything no matter how good the machine is.
See what your machine needs and do what you can with it.
George

zeroaxe:
MadJack,

Thanks for the encouragement. I might be a newbie to the home-modeling game, but one thing I know... Is if you have a problem, dont ignore it. Get down to the root and sort it out. I have learned this the hard way. Now, to bring this back to my lathe... I have the owner's manual. But in there, obviously, it doesnt get down to the in-depth of "How to" sort out your machine. It has got the usual maintanance and set-up instructions..... Not much use to man or beast if you have problems beyond the 'normal'.

So, I am all for learning how and WHY. I would love to strip down my lathe, and I could! But what bothers me is after I have it all in parts, what do I do? Where do I start and what do I look out for? I am also for buying old books. I have bought "Workshop Technology" part 1 and 2 (on recommendation of Bogstandard) as a very good intorduction to metals and how to work them. So if you cold kindly advise me of what book helped you sort out your lathe and bring it up to standard, I will gladly hunt for it!

Thank you :thumbup:

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